Refrigeration system.



N0 MODEL.

' BALI-EDITED APR. 21, 1903. Q. J. COLEMAN. REFRIGERATION SYSTEM.

APPLICATION FILED JAN. 22, 1900. RENEWED JULY 25, 1902.

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PATENTED APR. 21 1903.

o. J. COLEMAN. REFRIGERATION SYSTEM. APPLICATION PIELED JAN. 22, 1900.RENEWED JULY 25, 1902.

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CLYDE .l. COLEMAN, OF CHICAGO, ILLINOIS, ASSIGNOR, BY MESNE ASSIGN-MENTS, TO CLARENCE'VV. COLEMAN.

REFRIGERATION SYSTEM.

,PEGIFICATION forming part of Letters Patent No. 726,217, dated April21, 1903.

Application filed January 22,1900. Renewed July 25, 1902. Serial No.116,890. (No model.)

To all whom zit may concern:

Be it known that I, CLYDE J. COLEMAN, a citizen of. the United States ofAmerica, and a resident of Chicago, in the county of Cook and State ofIllinois, have invented certain new and useful Improvements inRefrigeration Systems, of which the following is a specification.

The present invention relates to refrigeram tion systemsin which therefrigerant medium is positively transferred from the coolingchamber inan automaticallycontrollable manner, and more particularly to 'thattypeof the same as shown in my prior application,

I5 Serial No. 733,689, filed October 19, 1899, in

which a denser intermediate fluid moving in an endless path is employedto effect the above-mentioned transfer of the refrigerant medium. I 3The object of the present improvement is to provide a simple andefficient apparatus in which the different operations of therefrigeration system are automatically controlled to maintain apredetermined temperature in the cooling-chamber, all as willhereinafter more fully appear and be more particularly pointed out inthe claims.

In the accompanying drawings, illustrative of the present invention,Figure 1 is a sectional elevation of a refrigeration apparatus embodyingthe present invention and showing the application thereof to an ordinaryhousehold water-cooler. Fig. 2 is an enlarged detail vertical section ofthe compression apparatus of the present system. Similar numerals ofreference indicate like parts in both views.

Rpferrin gtg the drawings, 1 represents the storage-chambenfeiatheefrigerant medium of the system, 2 the cooling or expansion chamber orcoil, and 3 the expansion-valve, located between the storage and coolingchambers, as usual in the present class of refrigeration systems.

The compression apparatus by which the expanded refrigerant medium, suchas ether or other analogous fluid or vapor, is drawn from thecooling-chamber and forced into the storage-chamber will in the presentimprovement comprise thefollowing-described mechanism: 4 is a jet-pumpor injector receiving its supply of a denser intermediate actuatingfluid, usually mercury, from an elevated supply-chamber 5. The inlet orsuction chamber 6 of such injector is connected by pipe connection 7with the cooling chamberor coil 3 and adapted to draw or exhaust the ex-;panded refrigerant medium therefrom. 8 is T a closed tank orreceiving-chamber into which the vertical eduction-pipe ,9 of theinjector 4 .60 discharges the intermediate motive fluid, leaving thelighter refrigerant medium in the upper portion of such chamber, fromwhence it passes, through pipe connection 10, into the condensing orstorage chamber 1 for subse- 'quent reuse in the process ofrefrigeration.

11 is a check-valve in the pipe connection 10 to prevent a return-flowof the refrigerant medium from the storage-chamber. 12 is aVerticalstand-pipeconnectingthelowercham 7o ber 8 with the elevatedsupply-chamber 5 of the injector, and in my preferred construction asshown in the drawings constitutes an inclosing-housing for thevertically-arranged operatingshaft 13 of the endless screw or propeller14., by means of which the denser intermediate actuating fluid isforcibly lifted from the lower chamber 8 to the upper chamher 5 inacontinuous manner during the operation of the system. Atits lower endthe operating-shaft 13 will be supported in a suitable bearing, so as toinsure the proper concentric'ity of the endless screw or propeller 14 inthe lower end of the stand-pipe 12 in the operation of the apparatus. Atits upper end the shaft 13 will be provided with a belt pulley 15 orother equivalent device having belt or other equivalent connection witha pulley 16 on the'armature-shaft of an electric motor 17. o

Inthe present improvement leakage of the refrigerant medium, as well asthe intermediate motive fluid, between the operatingshaft 13and theupperend of the stand-pipe 12 is prevented by a fixed inner cup-shaped 5sleeve 18,- secured within the stand-pipe, and

an inverted cup-shaped sleeve 19, secured to the operating-shaft 13, asshown in Fig. 2 of the drawings,the two members being fitted together,asshown, and containingabodyof liqtoo uid, usually mercury, to constitutea seal. With the above-described construction the sleeves can be made ofany required vertical length to afford the desired seal and at the sametime offer a minimum resistance to the rotation of the operating-shaft13.

In my preferred construction as shown in Fig. 2 of the drawings thelower end of the eduction-pipe 9 of the injector dips into theintermediate fluid contained in the lower receiving-chamber 8, so as toseal the lower end of such pipe 9 against a return-flow of therefrigerant medium through the injector. With such provision thenecessity of a mechanical check-valve in the pipe 9 is avoided.

20 is a thermostat located within the influence of the cooling coil orchamber 2 and adapted to open or close the electromotive circuit of theelectric motor 17, by which the compression apparatus of the system isimpelled, in accordance with the varying conditions existing in thecooling or expansion side of the system.

A minor feature of the present invention involves the particulararrangement of a refrigeration apparatus in connection with a householdwater-cooler, as illustrated in Fig. 1 of the accompanying drawings, andcomprises the mounting of the storage-coil 1 and the electric motor 17directly upon the topclosure or cover 21 of the water-cooler, with thecompression apparatus in a pendent condition exterior of the body of thewater-cooler and with the cooling-coil 2 in a similar pendent conditioninterior of said water-cooler, the purpose being to afford convenientaccess to the interior of the water-cooler for cleaning purposes and thelike.

In the operation of the present apparatus the expanded refrigerantmedium is drawn from the expansion-chamber 2 through pipe connection 7by the injector t and compressed into the upper part of the receiving orseparating chamber 8, from whence it passes through pipe connection 10to the storagechamber 1 to be again expanded in the expansion-chamber 2in the continued operation of the apparatus.

Having thus fully described my said invention, what I claim as new, anddesire to secure by Letters Patent, is-

1. In an automatic system of refrigeration, the combination with thestorage-chamber and cooling-chamber, of a compression apparatus arrangedintermediate of such chambers and comprising an injector, a connectionforming a circuit between the inlet and discharge ends of the injectorand adapted to contain a denser intermediate motive fluid, and anendless screw or propeller arranged in said connection and adapted toimpart movement to the motive fluid, and means connected with thecooling-chamber for automatically controlling such compressionapparatus, substantially as set forth.

2. In an automatic system of refrigeration, the combination with thestorage-chamber and the cooling-chamber, of a compression apparatusarranged intermediate of such chambers and comprising an injector, aconnection forming a circuit between the inlet and discharge ends of theinjector and adapted to contain a denser intermediate motive fluid, aseparating-chamber in said connection, and an endless screw or propellerarranged in said connection and adapted to impart movement to the motivefluid, and means connected with the cooling-chamber for automaticallycontrolling such compression apparatus, substantially as set forth.

4:. In an automatic system of refrigeration, the combination with thestorage-chamber and the cooling-chamber, of a compression apparatusarranged intermediate of such chambers and comprising an injector, aconnection forming a circuit between the inlet and discharge ends of theinjector and adapted to contain a denser intermediate motive fluid, aseparating-chamber in said connection, and an endless screw or propellerarranged in said connection and adapted to impart movement to the motivefluid, and means connected with the cooling-chamber for automaticallycontrolling such compression apparatus, the eduction connection of theinjector extending below the surface of the motive fluid in theseparating-chamber to constitute a seal, substantially as set forth.

5. In an automatic system of refrigeration, the combination with thestorage-chamber and the cooling-chamber, of a compression apparatusarranged intermediate of such chambers and comprising agravity-injector,alower receiving-tank, a return connection adapted tocontain adenser intermediate motive fluid, and an endless screw orpropeller arranged in said connection and adapted to impart movementtothe motive fluid, and means con:

nected with the cooling-chamber for auto ling said compressionapparatus, substantially as set forth. v v

7. In an automatic system of refrigeration,

as herein set forth, the combination with the.

tus attached to said cover, substantially as set forth.

- 9. In an automatic system of refrigeration as herein set forth, thecombination withthe water-cooler and the top-closure or cover thereof,of a refrigerant storage-chamber and the motor of the compressionapparatus mounted directlyupon said cover, and a cooling-ohamberand thecompression apparatus connected to said coverin a pendent manner,

substantially as set forth.

Signed by me atNewYork,N.-Y., this 16th day of January, 1900.

CLYDE-J. COL MAN.

WVitnesses:

ROBERT BURNS, HOLMES.

